Ouch, I understand why they want to not have a blocking webRequest API but I consider uBlock Origin to be a must-have extension. Hopefully this is relaxed somehow. I personally still use Firefox at home despite recent issues, but I honestly would prefer having both as an option, plus I always recommend uBlock Origin to everyone. (Disclaimer: I work at Google but not on Chrome, opinions are mine and not my employer's.…
Have there been recent issues? I've been using Firefox consistently for years and lately it seems better than usual.
Only had about 15 active tabs (though a number of dormant ones since last FF restart). Between the various processes, FF was using about 6-7GB of memory. Closing almost all of the tabs reclaimed about 2GB, so still a lot left over.
That said I'm not too bothered, I can restart FF every other week or so.